geo ch 10

I learned in chapter 10 about,tangents and that they are only touching the circle at one point. Unlike the secants that touch the circle in two points a secant is an extended chord basically. I also learned about how arcs are measured an arch with a point any where but the center of the circle on the outer edge of the circle its angle can be doubled to find the measure of the arc.angles at the center, the measure of the arc equals the measure of the angle.